It’ll be another hot and humid July day across the Lowcountry on Tuesday as high pressure at the surface and aloft remain the predominant weather features, at least for one more day. The morning starts in the mid-70s inland to near 80° at the coast and downtown, warming to the mid-90s once again in the afternoon. Heat indices should rise in the 102-105° range, especially in the immediate wake of the seabreeze thanks to the dewpoint surge that typically accompanies it. We should see showers and thunderstorms fire along and ahead of the seabreeze by afternoon. Storms that fire could dump a good bit of rain in some spots in a short period of time thanks to the tropical airmass left behind by Chantal, so we will need to monitor for the potential for minor flooding in poor drainage areas. A stronger storm or two can never be ruled out this time of year, either, with gusty winds the main concern.
After a Chantal-cooled weekend that saw our 21-day 90° streak come to an end, this upcoming week will once again feel very much like…well, July, as temperatures soar back to the mid-90s, especially for the first half of the week, with afternoon thunderstorm chances each day.
Tropical Storm Chantal will make landfall overnight somewhere between Georgetown and Myrtle Beach, keeping the risk for some showers around overnight into Sunday. We should see an uptick in shower and thunderstorm activity as the heating of the day helps to wring out some wrap-around moisture on the southwest side of Chantal’s circulation. Overall, though, this storm hasn’t been a major rainmaker for the area, and that shouldn’t change much on Sunday with the scattered nature of the individual showers and thunderstorms. Severe weather is not expected as we sit within the weaker side of Chantal’s circulation, but the risk for rip currents will continue and we should still have some breezy conditions at the beaches and on the bridges. Temperatures will start in the mid-70s again, but highs should stay below 90° for one more day with the clouds and rain in the area (though we should see a decent amount of sun between showers, too).
By the way, our 90° streak ended today at 21 days — the high at the airport topped out around 85°. Don’t worry, though — we’ll kick off a new streak starting Monday, and temperatures for the upcoming work week will certainly have that July feel to them, complete with Advisory-level heat indices.